NSW Breach of Telecommunications Law

I am currently being threatened to be taken to court and be "put behind bars" for breaking the telecommunications law apparently.

this is this rescue group (Australian Working Dog Rescue -AWDR-) that have stolen a dog and refuse to return it to the owner. over 100 of people on
Facebook are fighting to get the dog back and have posted on the AWDR Facebook wall simply asking why they are doing this. i also posted on there numerous times but was then blocked from doing so. I then got my boyfriend to comment and post on their wall.

Now, there is a group of facebook for all the people following this story and i posted on there saying "i have posted on AWDR wall with my account and got on my boyfriends account and posted a heap of comments". this particular post was screen shot and is now being used against me saying i have illegally used someone else account to harass members of the public, however my boyfriend willingly posted on there wall and commented. Have i broke the law